Hydraulic coupler



FIG. 1 is a perspective view from underneath the hydraulic coupler with the slide retracted;

FIG. 2 is a perspective view from underneath the hydraulic coupler from a different angle than FIG. 1 with the slide retracted;

FIG. 3 is a perspective view from underneath as seen in FIG. 2 with the slide extended;

FIG. 4 is a perspective view from the upper side of FIG. 2 with the slide retracted;

FIG. 5 is a perspective view from the upper side of FIG. 1 from a different angle with the slide retracted;

FIG. 6 is a perspective view from the upper side of FIG. 3 from a different angle with the slide extended;

FIG. 7 is a side elevational view of FIG. 3 with the slide extended; and,

FIG. 8 is a side elevational view of FIG. 1 with the slide retracted. 

I claim the ornamental design for the hydraulic coupler, as shown and described. 